're looking at technology developed by volvo that allows a truck to begin braking on its own when it senses a vehicle ahead. a collision warning system is set off when the truck is 1.5 seconds from rear-ending another vehicle. >> this is relatively new to our industry. it's not like passenger vehicles where lots of airbags and the kinds of things we've come to expect in safety options is available. >> reporter: until then, there are some ways to protect yourself when driving alongside these trucks. stay at least 10 car lengths ahead of a large truck before you change into the lane in front of it. remember, it takes the length of a football field for a truck to stop. if possible, only pass a truck on the left because the truck's blind spot on the right runs the length of its trailer and extends out three lanes. and finally, check the truck's mirrors. if you can't see the driver's face, the driver cannot see you. safety on the roads we all share. the industry believes only about 10% of all registered trucks have installed the new kind of technology. it is not required. there is no regulation.